General Science • ChemistryHard
Calculate the pH of a 0.001 molar aqueous solution of strong monoprotic hydrochloric acid, assuming complete dissociation at standard room temperature.
A. 1
B. 2
C. 3✓ Correct Answer
D. 4
💡 Solution & Explanation
The pH of a solution is defined as the negative logarithm to the base 10 of the hydrogen ion concentration in moles per litre. Since hydrochloric acid is a strong acid that dissociates completely, the hydrogen ion concentration equals 0.001 or 10 to the power of minus 3. Taking the negative logarithm yields a pH value of 3.
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